Robust copyright protection scheme for digital images using overlapping DCT and SVD

Authors:
Xiaotian Wu;Wei Sun
Affiliations:
School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006, China;School of Software, Sun Yat-sen University, Guangzhou 510006, China
Venue:
Applied Soft Computing
Year:
2013

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Abstract

In this paper, a robust lossless copyright protection scheme, based on overlapping discrete cosine transform (DCT) and singular value decomposition (SVD), is presented. The original host image is separated into overlapping blocks, to which the DCT is applied. Direct current (DC) coefficients are extracted from the transformed blocks to form a DC-map. A series of random positions are selected on the map and SVD is performed to construct an ownership share which is used for copyright verification. Simulation results are carried out, demonstrating the robustness of the proposed scheme against different image-manipulation attacks.